The content of nitrite in pickles fluctuates, which is relatively high at first, then gradually decreases and finally tends to be stable. Generally speaking, eating kimchi will not cause great harm to human body, because the consumption is limited and some of it will be destroyed in the cooking process, so eating kimchi is not as harmful as advertised. Facts have proved that human beings have been eating it for many years, and the side effects are far better than water pollution, food pollution, air pollution and reducing pollution.